a device that gives out light in which all the waves oscillate (= change direction and strength) together, typically producing a powerful beam of light that can be used for cutting metal, in medical operations, etc.激光器- a laser beam激光束
- a laser navigation device激光导航装置
- The barcodes on the products are read by lasers.产品上的条码是用激光读取的。
- a laser show (= lasers used as entertainment)激光表演
- She's had laser surgery on her eye.她做了眼部激光手术。
- laser treatment/therapy激光治疗
Topics Physics and chemistryc1Oxford Collocations Dictionaryadjectiveverb + laserlaser + nounSee full entry Word Origin1960s: acronym from light amplification by stimulated emission of radiation, on the pattern of maser.